“They thought that they were going to gain political power and wealth from promoting massive non-white immigration and Leftism in every Western country.”
I think that’s a bit of a stretch. We’re talking about the 30s, 40s, 50s and what I suppose was called “the Negro problem”. Don’t think anyone was thinking about non-white immigration from foreign lands.
The two key US Senators who initiated the immigration nightmare were Ted Kennedy and Jacob Javits, obviously Kennedy was Catholic.
However at that time they were changing the rules for legal immigration in the 1960s.
The illegal invasion is of more modern origin.